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Identification, properties, and differential counts of cell populations using electron microscopy of dry cows secretions, colostrum and milk from normal cows

Published online by Cambridge University Press:  01 June 2009

Chee-Seong Lee
Affiliation:
Agricultural Research Council, Institute of Animal Physiology, Babraham, Cambridge, CB2 4AT
F. B. Peter Wooding
Affiliation:
Agricultural Research Council, Institute of Animal Physiology, Babraham, Cambridge, CB2 4AT
Patrick Kemp
Affiliation:
Agricultural Research Council, Institute of Animal Physiology, Babraham, Cambridge, CB2 4AT

Summary

Differential counts of electron microscope sections of cell pellets isolated from bovine udder secretions showed that no secretory epithelial cells and very few ductal epithelial cells were present at any stage. The predominant cell type was the macrophage in dry and lactating cows or the polymorphonuclear leucocyte (PMNL) in colostrum. Lymphocytes were also present but no plasma cells were found. The macrophages took up polystyrene latex particles (as did the PMNL) and adhered toglass in culture. Neither macrophage-nor PMNL-rich cell suspensions produced any increase in free fatty acid levels when incubated with fresh milk.

Type
Original Articles
Copyright
Copyright © Proprietors of Journal of Dairy Research 1980

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Identification, properties, and differential counts of cell populations using electron microscopy of dry cows secretions, colostrum and milk from normal cows
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